21232023210 has 32 divisors (see below), whose sum is σ = 56618729280. Its totient is φ = 5661872784.

The previous prime is 21232023167. The next prime is 21232023221. The reversal of 21232023210 is 1232023212.

21232023210 is a `hidden beast` number, since 21 + 2 + 320 + 2 + 321 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39318292 + ... + 39318831.

It is an arithmetic number, because the mean of its divisors is an integer number (1769335290).

Almost surely, 2^21232023210 is an apocalyptic number.

21232023210 is an abundant number, since it is smaller than the sum of its proper divisors (35386706070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232023210 is a wasteful number, since it uses less digits than its factorization.

21232023210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78637139 (or 78637133 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21232023210 its reverse (1232023212), we get a palindrome (22464046422).

The spelling of 21232023210 in words is "twenty-one billion, two hundred thirty-two million, twenty-three thousand, two hundred ten".